ChraLab DHS - Duo-Headspace sampler
The headspace mode:
With the syringe only concept of the ChraLab DHS a headspace technology has been introduced to eliminate the headaches commonly associated with conventional autosamplers. The robotic vial processing operation allows sample analysis in a straightforward and simple way. Sample vials are transported into the heated six position incubator for preconditioning. After reaching the equilibration, a heated gas-tight syringe is moved over the incubator and the headspace sample is withdrawn. After sample injection the hot syringe is automatically cleaned by purging with inert gas. No complicated error prone operations e.g. vial pressurization, valve switching, loop filling or heated transfer lines are involved. For maximum throughput, the intelligently controlled vial transfer into the incubator oven ensures that a sample is always ready to be injected when the previous run is completed.
Beside the simple and transparent sample operation the ChraLab DHS offers even more advantages over conventional headspace sampling:
The SPME mode:
In the few years since it's introduction, solid phase microextraction (SPME) has become established as a practical alternative for sample preparation for gaschromatography. SPME reduces the time required for sample preparation and eliminates the use of large volumes of extraction solvents. In SPME, analytes establish equilibria among the sample matrix, the headspace above the sample, and a stationary phase coated on a fused silica fiber, then are thermally desorbed from the fiber to a capillary GC column. Because no solvent is injected, and the analytes are rapidly desorbed onto the column, minimum detection limits are improved and resolution is maintained. SPME is useful in many different analysis, including characterization of environmental, forensic, food/flavor and pharmaceutical compounds. The CombiPAL provides a fully automated SPME sample preparation process*. All movements of the SPME fiber from precondition, adsorption and desorption are precisely controlled for optimum performance. Prior and during extraction the samples can be shaked and heated, which dramatically reduces analysis time for semivolatile compounds. Variable vial penetration depth allows to extract the compounds in liquid samples itself or in the headspace area above liquid/solid samples. After the compounds are thermally desorbed in the hot GC injector, the fiber may be fully cleaned again in a special heated and purged Fiber Conditioning Station.
With software control Intelligent Automation:
The Windows 98/NT4/2000/XP software Cycle Composer provides remote control for the ChraLab DHS GC Front End liquid handling systems. The Cycle Composer software allows the operator to easily setup, edit and run CombiPAL methods for even very complex Prep and Load applications.
Easy to use:
The Cycle Composer affords complete control over sequence and location of liquid handling steps, thereby increasing throughput and productivity of the ChraLab DHS System. The point and click operation quickly directs the user through programming steps that configure instrument setup, methods and sample lists. For routine daily use, no special programming skills are needed. The Cycle Composer contains a library of common liquid handling procedures including
sample transfer, reagent/standard addition, mixing and dilution steps.
Customize your ChraLab DHS:
As with the ChraLab DHS hardware concept the Cycle Composer is already prepared for individual application requirements. Additional flexibility can be assigned to sample prep procedures by using the powerful Cycle Composer macro language, which expands the application range of every ChraLab DHS System.
Single keyboard operation:
The Cycle Composer can be used as an independent standalone software platform or if required fully integrated in leading GC-MS data acquisition systems. Currently the following control drivers are available either through ChraLab DHS Analytics or your instrument vendor.
Minimum PC requirements:
|Specifications|| ChraLab DHS Brochure: https://chratec.com/portal/index.php/s/MrRHsAKnFRCKWxZ|
System type: XYZ robot with syringe only concept, no tubing in sample path
Local user interface: Control panel with 4 function keys, graphical LCD display, unique scroll knob for teach functions
- Power Requirements: 100-240 V, 120W, 50/60 Hz
- Environment: 4°C-40°C constant temperature, < 80% humidity (non condensing)
- Dimensions: L: 828mm D: 385mm H: 648mm